Question

List any four advantages of water harvesting

Answer 1

Water is used for drinking purpose,irrigation, washing cloths, and most important generating electricity

Answer 2

For garden or lawn irrigation:

collect from any roof material except unsealed asbestosensure all gutters fall towards the outletspreferably fit an effective leaf screen to the guttersuse gutter outlets that fit to the underside of the gutter.

For all other uses, also:

prevent vegetation from overhanging the roofclean the roof and gutters before installing the systemfit a good quality leaf screen to gutters or use a leaf-shedding gutter.

For drinking water, also avoid collecting rainwater:

from sections of roof containing lead flashing or asbestos sheeting, and from roofs painted with pre-1980 paint — if they cannot be avoided, seal properly by preparing the surface and painting with a suitable potable-quality roof sealant, and do not collect rainwater from the first few rainfall events after sealingin areas where airborne toxins are present from nearby activities such as crop-dusting and chemical processing.